Residual chlorine measuring device

Abstract

The utility model discloses a residual chlorine measuring device, which is used for detecting the chlorine content in a liquid to be detected, and comprises a device main body, an electrode assembly, a rotating part and an electromagnetic driving part, a circulation cavity is formed in the device main body; the electrode assembly comprises a base, a first electrode and a second electrode, the base is mounted in the device main body, and a detection part formed by extending one end of the first electrode towards the interior of the circulation cavity is matched with the second electrode to detect the chlorine content in the to-be-detected liquid; the electromagnetic driving part comprises a first driving part and a second driving part, the second driving part is arranged in the rotating part, and the first driving part and the second driving part generate relative movement under the action of a magnetic field, so that the rotating part can clean impurities on the surfaces of the first electrode and the second electrode in the rotating process; the risk that bubbles in the to-be-measured liquid are attached to the surface of the electrode can be reduced, the mass transfer process of the to-be-measured liquid is accelerated, and uniform concentration of the to-be-measured liquid is ensured, so that the waste of the to-be-measured liquid is reduced while the accuracy of a residual chlorine measurement result is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of residual chlorine detection, and particularly relates to a residual chlorine measuring device. BACKGROUND

[0002] To ensure that tap water meets safety and health requirements, tap water is treated by adding disinfectants such as sodium hypochlorite to inactivate microorganisms in the water during water treatment. After the disinfectants such as sodium hypochlorite are put into the water, in addition to consuming part of the chlorine amount by reacting with bacteria, microorganisms and the like in the water, there is still a part of the chlorine amount, which is called residual chlorine. If the residual chlorine in the water exceeds the normal value range of residual chlorine, it will cause serious harm to people and the environment. Therefore, it is very important to accurately measure the content of residual chlorine in water.

[0003] In the related art, the content of residual chlorine in water is monitored online by an electrochemical method. However, during the measurement process, impurities are easily adsorbed or deposited on the surface of the residual chlorine measuring electrode, causing contamination of the surface of the residual chlorine measuring electrode. At the same time, in the related art, flowing water samples are continuously introduced into the residual chlorine measuring device to accelerate diffusion by using the continuous flow of the water samples, so as to maintain the uniform consistency of the water sample concentration during the measurement process. However, this method not only easily causes water waste, but also easily causes bubbles in the water sample to adhere to the surface of the residual chlorine measuring electrode, which affects the sensitivity of the residual chlorine measuring electrode and further affects the measurement result of the residual chlorine content. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a residual chlorine measuring device, which can solve the problems of contamination deposited on the surface of the residual chlorine electrode, bubbles in the water sample adhering to the surface of the residual chlorine electrode affecting the accuracy of the residual chlorine measurement result, and water sample waste in the related art.

[0005] To solve the above technical problems, the application is implemented as follows:

[0006] The application embodiment provides a residual chlorine measuring device for detecting the chlorine content in a to-be-measured liquid, comprising a device main body, an electrode assembly, a rotating piece and an electromagnetic driving piece.

[0007] A flow-through cavity for flowing of the to-be-measured liquid is arranged in the device main body.

[0008] The electrode assembly comprises a base, a first electrode and a second electrode. The base is installed in the device main body. One end of the first electrode is connected to the base, and the other end of the first electrode extends towards the flow-through cavity to form a detection part. The second electrode is arranged on one side of the base facing the flow-through cavity. The detection part and the second electrode cooperate to detect the chlorine content in the to-be-measured liquid.

[0009] The rotating piece is rotationally connected to the first electrode, and the second electrode at least partially contacts the rotating piece.

[0010] The electromagnetic driving member comprises a first driving member and a second driving member, the first driving member is arranged in the base, the second driving member is arranged in the rotating member, the first driving member and the second driving member are arranged oppositely, at least one of the first driving member and the second driving member is adapted to be electrically connected with an external power source, so that the first driving member and the second driving member produce relative movement under the action of a magnetic field, to drive the rotating member to rotate and clean the impurities on the surface of the second electrode.

[0011] Optionally, the first driving member is one of an electromagnet and a permanent magnet, and the second driving member is the other one of the electromagnet and the permanent magnet.

[0012] Optionally, the rotating member comprises a rotating part and a wing part, the wing part is arranged at both ends of the rotating part along a direction perpendicular to a rotation axis of the rotating part, the rotating part is rotationally connected to the detection part, and the second driving member is arranged in the wing part. Optionally, the device body is provided with an import hole, a first export hole and a second export hole which are in communication with the flow-through cavity; along the rotation axis of the rotating member, an inner wall of the flow-through cavity is provided with a protruding part at a position corresponding to the detection part, the protruding part is provided with a flow guide channel, and the flow guide channel is in communication with the first export hole and the flow-through cavity.

[0013] The to-be-tested liquid enters the flow-through cavity from the import hole, the rotating member rotates relative to the first electrode to agitate the to-be-tested liquid, so that the gas bubbles in the to-be-tested liquid accumulate in the flow guide channel and are discharged from the first export hole, and the second export hole is used for guiding the to-be-tested liquid after detection.

[0014] Optionally, the flow guide channel has oppositely arranged first and second ends, the first end is in communication with the flow-through cavity, the second end is in communication with the first export hole, and the flow-through cross-sectional area of the flow guide channel gradually decreases from the first end to the second end.

[0015] Optionally, an outer wall of the protruding part and an inner wall of the flow-through cavity form a collection groove, and the second export hole is in communication with the collection groove.

[0016] Optionally, the residual chlorine measuring device further comprises a rotating speed detection member, the rotating speed detection member is installed in the device body and is used for detecting the rotating speed of the rotating member.

[0017] Optionally, the residual chlorine measuring device further comprises a controller, the controller is electrically connected with the electrode assembly and the electromagnetic driving member respectively, and the controller is used for changing the frequency of the rotating magnetic field generated by the electromagnetic driving member based on the detection result of the electrode assembly.

[0018] Optionally, the residual chlorine measuring device further comprises a temperature detecting member, which is installed in the device main body and extends into the flow cavity at least partially, and is used for detecting the temperature of the liquid to be measured.

[0019] Optionally, the residual chlorine measuring device further comprises a third electrode, which is installed in the device main body and extends into the flow cavity at least partially, and cooperates with the first electrode and the second electrode to detect the chlorine content in the liquid to be measured.

[0020] Optionally, the residual chlorine measuring device further comprises a sampling head, which is installed in the device main body and communicates with the flow cavity, and is used for leading out the liquid to be measured.

[0021] In the embodiments of the present application, the first electrode and the second electrode are arranged to detect the chlorine content in the liquid to be measured by cooperation of the first electrode and the second electrode; meanwhile, the rotating member and the electromagnetic driving member are arranged, and the second electrode is at least partially in contact with the rotating member, so that the electromagnetic driving member drives the rotating member to rotate relative to the first electrode by electromagnetic action, and then the rotating member generates friction with the surfaces of the first electrode and the second electrode during rotation, so as to not only clean the impurities on the surfaces of the first electrode and the second electrode and ensure the cleanliness of the surfaces of the first electrode and the second electrode, but also reduce the risk of bubbles in the liquid to be measured adhering to the surfaces of the first electrode and the second electrode, thereby improving the accuracy of the residual chlorine measurement result; meanwhile, the rotation of the rotating member accelerates the mass transfer process of the liquid to be measured, so as to ensure the uniformity of the concentration of the liquid to be measured, thereby reducing the waste of the liquid to be measured.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0024] Figure 1 is a sectional view of a residual chlorine measuring device according to an embodiment of the present application;

[0025] Figure 2 is a partial sectional view of a residual chlorine measuring device according to an embodiment of the present application;

[0026] Figure 3 is a connection structure schematic diagram of a controller according to an embodiment of the present application.

[0027] REFERENCE SIGNS:

[0028] 100: device body; 110: flow cavity; 111: protruding part; 112: flow guide channel; 1121: first end; 1122: second end; 120: introduction hole; 130: first outlet hole; 140: second outlet hole; 150: collection groove; 200: electrode assembly; 210: base; 220: first electrode; 230: second electrode; 240: third electrode; 300: rotating piece; 310: rotating part; 320: wing part; 400: electromagnetic driving piece; 410: first driving piece; 420: second driving piece; 500: rotating speed detection piece; 600: temperature detection piece; 700: sampling head; 800: controller; 810: conversion module; 820: control module; X: rotation axis direction. DETAILED DESCRIPTION

[0029] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are for the purpose of explanation of the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts, are within the scope of protection of the present application.

[0030] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0031] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The residual chlorine measuring device and detection system provided by the embodiments of the present application will be described in detail below in combination with the drawings, through specific embodiments and application scenarios.

[0034] As shown in Figure 1 and Figure 2 , according to the residual chlorine measuring device according to some embodiments of the present application, for detecting the chlorine content in the liquid to be measured, comprising: a device main body 100, an electrode assembly 200, a rotating part 300 and an electromagnetic driving part 400; The device main body 100 is provided with a flow cavity 110 for the flow of the liquid to be measured; The electrode assembly 200 includes a base 210, a first electrode 220 and a second electrode 230, the base 210 is installed in the device main body 100, one end of the first electrode 220 is connected to the base 210, the other end of the first electrode 220 extends towards the flow cavity 110 to form a detection part, the second electrode 230 is provided on the side of the base 210 facing the flow cavity 110, the detection part and the second electrode 230 cooperate to detect the chlorine content in the liquid to be measured; The rotating part 300 is rotatably connected to the first electrode 220, and the second electrode 230 at least partially contacts the rotating part 300; The electromagnetic driving part 400 includes a first driving part 410 and a second driving part 420, the first driving part 410 is arranged in the base 210, the second driving part 420 is arranged in the rotating part 300, the first driving part 410 and the second driving part 420 are arranged opposite to each other, at least one of the first driving part 410 and the second driving part 420 is adapted to be electrically connected with an external power supply, so that the first driving part 410 and the second driving part 420 produce relative movement under the action of a magnetic field, to drive the rotating part 300 to rotate and clean the impurities on the surface of the second electrode 230.

[0035] In the embodiment of the present application, the first electrode 220 and the second electrode 230 are arranged to detect the chlorine content in the liquid to be measured by cooperation of the first electrode 220 and the second electrode 230. Meanwhile, the rotary member 300 and the electromagnetic driving member 400 are arranged, and the second electrode 230 is at least partially in contact with the rotary member 300, so that the rotary member 300 is driven to rotate relative to the first electrode 220 by the electromagnetic action of the electromagnetic driving member 400, and then the rotary member 300 generates friction with the surfaces of the first electrode 220 and the second electrode 230 during rotation, thereby not only cleaning the impurities on the surfaces of the first electrode 220 and the second electrode 230 to ensure the cleanliness of the surfaces of the first electrode 220 and the second electrode 230, but also reducing the risk of bubbles in the liquid to be measured adhering to the surfaces of the first electrode and the second electrode, thereby improving the accuracy of the residual chlorine measurement result. Meanwhile, the rotation of the rotary member accelerates the mass transfer process of the liquid to be measured, ensuring the uniformity of the concentration of the liquid to be measured, thereby reducing the waste of the liquid to be measured.

[0036] Specifically, during the operation of the second electrode 230, impurities or organic substances in the liquid to be measured may adhere to the surfaces of the first electrode 220 and the second electrode 230, causing pollution of the first electrode 220 and the second electrode 230 and affecting the efficiency of the electrode reaction, thereby reducing the accuracy of the measurement result and affecting the stability of the measurement process. Therefore, the electromagnetic driving member 400 provided in the embodiment is used to drive the rotary member 300 to rotate, so that the rotary member 300 generates friction with the first electrode 220 and the second electrode 230 during rotation, thereby cleaning the impurities on the surfaces of the first electrode 220 and the second electrode 230.

[0037] On the other hand, the electromagnetic driving member 400 is used to drive the rotation of the rotary member 300 by electromagnetic action, so that the rotation speed of the rotary member 300 can be adjusted by changing the frequency of the rotating magnetic field generated by the electromagnetic driving member 400. This way of driving the rotation of the rotary member 300 by electromagnetic action not only makes the rotation of the rotary member 300 more stable, but also has good sealing performance, thereby improving the service life of the residual chlorine measuring device.

[0038] In some embodiments, the electromagnetic driver 400 drives the rotating member 300 to continuously stir the to-be-tested liquid during rotation, so that the suspended matter in the to-be-tested liquid is difficult to deposit in the flow cavity 110, and the suspended matter can be quickly discharged from the flow cavity 110, thereby avoiding pollution to the surfaces of the first electrode 220 and the second electrode 230. It should be noted that, in the process of detecting the residual chlorine content in the to-be-tested liquid based on the electrochemical method, the flow rate of the to-be-tested liquid affects the mass transfer process in the electrochemical reaction. In the related art, the to-be-tested liquid introduced into the flow cavity 110 from the introduction hole 120 is used to drive the rotation of the rotating member 300 by the pushing force when the to-be-tested liquid flows, to accelerate the mass transfer process of the to-be-tested liquid, and to keep the solute uniform, thereby ensuring the accuracy of the residual chlorine content measurement result. However, the to-be-tested liquid needs to maintain a constant flow rate during the residual chlorine measurement, or when the rotation speed of the rotating member 300 needs to be increased, the flow rate of the to-be-tested liquid needs to be increased accordingly, which will significantly increase the consumption of the to-be-tested liquid, thereby causing waste of the to-be-tested liquid. The electromagnetic driver 400 drives the rotating member 300 to run, which not only can flexibly adjust the rotation speed of the rotating member 300, but also can significantly reduce the waste of the to-be-tested liquid, thereby saving costs.

[0039] It should also be noted that the to-be-tested liquid itself contains bubbles, which are easy to adhere to the surfaces of the first electrode 220 and the second electrode 230, thereby affecting the sensitivity of the electrode measurement. The rotating member 300 provided in the embodiments of the present application can reduce the risk of the bubbles adhering to the surfaces of the first electrode 220 and the second electrode 230 during rotation, thereby further improving the accuracy of the residual chlorine detection.

[0040] Optionally, the first driver 410 is one of an electromagnet and a permanent magnet, and the second driver 420 is the other of the electromagnet and the permanent magnet.

[0041] In the embodiments of the present application, the electromagnet and the permanent magnet are used as the first driver 410 or the second driver 420, which not only has a compact and simple structure, occupies a small space, but also is easy to install and saves costs.

[0042] Optionally, as shown in Figure 2 The rotating member 300 includes a rotating part 310 and a wing part 320, the wing part 320 is arranged at both ends of the rotating part 310 along a direction X perpendicular to the rotation axis of the rotating part 310, the rotating part 310 is rotationally connected to the detection part, and the second driver 420 is arranged in the wing part 320.

[0043] In the embodiment of the present application, the rotating part 310 is rotatably connected with the detection part, and the second driving member 420 is arranged in the wing part 320. In this way, the wing part 320 can reduce the shielding of the second electrode 230 by the rotating part 300, and the second electrode 230 can be fully contacted with the to-be-measured liquid, thereby avoiding affecting the measurement process.

[0044] Specifically, the rotating part 310 is provided with a mounting hole, the part of the detection part inserted into the flow cavity 110 passes through the mounting hole and is rotatably connected with the rotating part 310, and the detection part is at least partially in contact with the rotating part 310. In this way, the rotating part 310 can generate friction with the detection part during rotation around the detection part, so as to clean the impurities on the surface of the detection part by using the friction effect, thereby avoiding that the impurities on the surface of the detection part affect the accuracy of the measurement result. In addition, the second driving member 420 can be arranged in multiple, and the multiple second driving members 420 are arranged at intervals around the rotating part 310.

[0045] Optionally, as shown in Figure 1 the device body 100 is also provided with an import hole 120, a first export hole 130 and a second export hole 140 which are in communication with the flow cavity 110. In the direction of the rotation axis X of the rotating part 300, the inner wall of the flow cavity 110 is provided with a protruding part 111 at the position corresponding to the detection part, and the protruding part 111 is provided with a flow guide channel 112 which is in communication with the first export hole 130 and the flow cavity 110.

[0046] The to-be-measured liquid enters the flow cavity 110 from the import hole 120, and the rotating part 300 rotates relative to the first electrode 220 to agitate the to-be-measured liquid, so that the bubbles in the to-be-measured liquid accumulate in the flow guide channel 112 and are discharged from the first export hole 130. The second export hole 140 is used to discharge the to-be-measured liquid after detection.

[0047] In the embodiment of the present application, the protruding part 111 is arranged at the position corresponding to the detection part on the inner wall of the flow cavity 110, and the flow guide channel 112 which is in communication with the first export hole 130 and the flow cavity 110 is arranged in the protruding part 111. In this way, when the rotating part 300 rotates relative to the detection part to agitate the to-be-measured liquid in the flow cavity 110, the bubbles generated in the to-be-measured liquid during agitation can be converged into the flow guide channel 112, and then discharged from the first export hole 130. The to-be-measured liquid after detection is discharged from the second export hole 140, so that the bubbles are separated from the to-be-measured liquid, thereby significantly reducing the bubbles in the to-be-measured liquid discharged from the second export hole 140. Therefore, the to-be-measured liquid discharged from the second export hole 140 can meet the test requirements of the detection items which are sensitive to bubbles, such as subsequent turbidity measurement and conductivity measurement, thereby improving the accuracy of the turbidity measurement and conductivity measurement results.

[0048] In a specific application, the to-be-measured liquid can be tap water, and the residual chlorine measuring device can be used to measure the residual chlorine content in the tap water. Specifically, the tap water is mainly drawn from rivers, lakes and underground water through the water pump station of the water plant, and is treated by the tap water plant according to the national drinking water health standards through processes such as sedimentation, disinfection, filtration and the like, and finally delivered to each user through the pipe network. The residual chlorine content, turbidity, PH value and conductivity and other parameters of the tap water need to be monitored during the delivery of the tap water through the pipe network. When measuring the residual chlorine content in the tap water, the tap water needs to be stirred by the rotating piece 300 to make the concentration of the tap water uniform, so as to improve the accuracy of the residual chlorine content measurement result, but there are bubbles in the tap water, and bubbles are also generated in the stirring process of the tap water, and the subsequent turbidity measurement, conductivity measurement and other measurement items are sensitive to the bubbles in the tap water, and if these bubbles are discharged with the tap water, the accuracy of the measurement result of the turbidity measurement and the conductivity measurement will be reduced. Therefore, in this embodiment, the protruding part 111 is arranged at the position corresponding to the detection part on the inner wall of the flow cavity 110, and the flow channel 112 communicating with the first discharge hole 130 and the flow cavity 110 is arranged in the protruding part 111, so that the bubbles are separated from the to-be-measured liquid, thereby meeting the measurement requirements of the subsequent turbidity measurement and conductivity measurement.

[0049] Optionally, as shown in Figure 1 , the flow channel 112 has a first end 1121 and a second end 1122 arranged oppositely, the first end 1121 communicates with the flow cavity 110, and the second end 1122 communicates with the first discharge hole 130. From the first end 1121 to the second end 1122, the flow area of the flow channel 112 gradually decreases.

[0050] In the embodiment of the present application, by gradually reducing the flow area of the flow channel 112 from the first end 1121 to the second end 1122, and by communicating the second end 1122 with the first discharge hole 130, the flow channel 112 is arranged as a "horn mouth" interface, which is conducive to the collection of bubbles by the flow channel 112, thereby improving the effect of the flow channel 112 on collecting bubbles, so that the bubbles are separated from the to-be-measured liquid in time and discharged from the first discharge hole 130, and the bubbles in the to-be-measured liquid discharged from the second discharge hole 140 are further reduced.

[0051] Specifically, as shown in Figure 1 , the flow cross section of the flow channel 112 can be circular, and the radial dimension of the flow cross section gradually decreases from the first end 1121 to the second end 1122 of the flow channel 112.

[0052] Optionally, as shown in Figure 1 , the outer wall of the protruding part 111 and the inner wall of the flow cavity 110 form a collection groove 150, and the second discharge hole 140 communicates with the collection groove 150.

[0053] In the embodiment of the present application, the outer wall of the protruding part 111 and the inner wall of the flow cavity 110 enclose the collection groove 150, and the second discharge hole 140 communicates with the collection groove 150, so that when the to-be-measured liquid is agitated by the rotating member 300, the generated bubbles are collected in the guide flow channel 112, and the to-be-measured liquid flows outward under the action of the centrifugal force, and then the to-be-measured liquid flows through the collection groove 150 and is discharged from the second discharge hole 140, further reducing the bubbles in the to-be-measured liquid discharged from the second discharge hole 140, thereby meeting the requirements of subsequent turbidity measurement and conductivity measurement.

[0054] It can be understood that the collection groove 150 is arranged around the outer periphery of the protruding part 111, and the specific arrangement mode of the collection groove 150 can be flexibly arranged according to actual conditions, and the embodiment does not limit it.

[0055] Optionally, as shown in Figure 1 The residual chlorine measuring device further includes a rotating speed detection member 500 installed in the device main body 100 and used for detecting the rotating speed of the rotating member 300.

[0056] In the embodiment of the present application, the rotating speed detection member 500 is arranged in the device main body 100, so that the rotating speed detection member 500 can detect the rotating speed of the rotating member 300. Based on the rotating speed of the rotating member 300, the working state of the residual chlorine measuring device can be monitored to find abnormal phenomena in the operation process of the rotating member 300 in time, so that maintenance or replacement can be performed in time, and the operation stability of the residual chlorine measuring device is improved.

[0057] It should be noted that the rotating speed detection member 500 can be a contact type rotating speed detection member or a non-contact type rotating speed detection member. When the contact type rotating speed detection member is selected, the rotating speed detection member at least partially extends into the flow cavity 110 to detect the rotating speed of the rotating member 300; when the non-contact type detection member is selected, the rotating speed detection member 500 can be a Hall sensor, as shown in Figure 1 The Hall sensor can be arranged close to the electromagnetic driving member 400 to enable the Hall sensor to measure the speed of the rotating member 300 by detecting the change of the magnetic field.

[0058] It can be understood that the specific type and arrangement position of the rotating speed detection member 500 can be flexibly selected and arranged according to actual requirements, and the embodiment does not limit it.

[0059] Optionally, as shown in Figure 3 The residual chlorine measuring device further includes a controller 800 electrically connected with the electrode assembly 200 and the electromagnetic driving member 400, and the controller 800 is used for changing the frequency of the rotating magnetic field generated by the electromagnetic driving member 400 based on the detection result of the electrode assembly 200.

[0060] In the embodiment of the present application, the controller 800 comprises a conversion module 810 and a control module 820; the conversion module 810 is configured to convert the current detected by the electrode assembly 200 into a voltage signal, and the control module 820 is configured to change the frequency of the rotating magnetic field generated by the electromagnetic driver 400 based on the voltage signal, so as to adjust the rotating speed of the rotating member 300.

[0061] Specifically, the to-be-tested liquid flows into the flow cavity 110 through the inlet hole 120, the electromagnetic driver 400 drives the rotating member 300 to rotate, so as to agitate the to-be-tested liquid, to accelerate the mass transfer process of the liquid to be tested, and to ensure that the concentration of the to-be-tested liquid around the detection part is uniform; the residual chlorine in the to-be-tested liquid undergoes an oxidation-reduction reaction on the surface of the detection part to generate a current signal; the conversion module 810 receives the current generated by the electrode assembly 200, and then amplifies and converts the current into a voltage signal, and converts the voltage signal into a residual chlorine concentration value in the to-be-tested liquid according to preset calibration information, wherein the specific method of converting the voltage signal into the residual chlorine concentration value is performed by referring to related technologies.

[0062] In some embodiments, the surface of the electrode assembly 200 may be contaminated, thereby causing the voltage signal obtained by the conversion module 810 to be abnormal, or the concentration of the to-be-tested liquid is not uniform, causing the voltage signal obtained by the conversion module 810 to exceed the preset voltage range, which will affect the accuracy of the residual chlorine measurement device in measuring the residual chlorine concentration of the to-be-tested liquid. At this time, the control module 820 can change the frequency of the rotating magnetic field generated by the electromagnetic driver 400, so as to adjust the rotating speed of the rotating member 300, accelerate the mass transfer of the chlorine ions in the to-be-tested liquid, and improve the sensitivity of the electrode assembly 200, thereby providing the accuracy of the residual chlorine measurement result.

[0063] Optionally, as shown in Figure 1 the residual chlorine measurement device further comprises a temperature detection member 600, which is installed in the device main body 100 and at least partially extends into the flow cavity 110, and is configured to detect the temperature of the to-be-tested liquid.

[0064] In the embodiment of the present application, by installing the temperature detection member 600 in the device main body 100 and making the temperature detection member 600 partially extend into the flow cavity 110, the temperature detection member 600 can be used to detect the temperature of the to-be-tested liquid flowing into the flow cavity 110 in real time. Based on the temperature data of the to-be-tested liquid as a reference, the measurement result of the residual chlorine content is analyzed in association, and the detection result of the chlorine content is corrected accordingly, thereby improving the reliability of the measurement result.

[0065] Optionally, as shown in Figure 1As shown, the residual chlorine measuring device further comprises a third electrode 240, which is installed in the device body 100 and at least partially extends into the flow cavity 110, and the third electrode 240 cooperates with the first electrode 220 and the second electrode 230 to detect the chlorine content in the liquid to be measured.

[0066] In the embodiment of the present application, by installing the third electrode 240 in the device body 100 and making the third electrode 240 at least partially extend into the flow cavity 110, the third electrode 240 can be used to cooperate with the first electrode 220 and the second electrode 230 to detect the chlorine content in the liquid to be measured.

[0067] In a specific application, the electrode assembly 200 comprises the first electrode 220, the second electrode 230 and the third electrode 240, which are respectively installed in the device body 100 and at least partially extend into the flow cavity 110 to contact the liquid to be measured. Among them, the first electrode 220 is a working electrode, and a detection part is arranged in the working electrode, which at least extends into the flow cavity 110 to contact the liquid to be measured and generate a redox reaction to generate a current signal; the second electrode 230 is an auxiliary electrode, also known as a counter electrode, which is used to form a test loop with the working electrode and serves as a conductor; the third electrode 240 is a reference electrode, which is used to provide a stable potential reference to correct the potential change of the working electrode and ensure the accuracy of the measurement results.

[0068] For example, the first electrode 220 can be a solid electrode such as a platinum electrode or a gold electrode; the second electrode 230 can be a graphite electrode or a platinum electrode; and the third electrode 240 can be a saturated calomel electrode or an Ag / AgCl electrode. It can be understood that the specific types of the first electrode 220, the second electrode 230 and the third electrode 240 can be selected flexibly according to the properties of the liquid to be measured and experimental conditions, and the present embodiment does not limit them.

[0069] Optionally, as shown, Figure 1 The residual chlorine measuring device further comprises a sampling head 700, which is installed in the device body 100 and communicates with the flow cavity 110 to guide the liquid to be measured out.

[0070] In the embodiment of the present application, by arranging the sampling head 700 in the device body 100 and making the sampling head 700 communicate with the flow cavity 110, the liquid to be measured can be taken by the sampling head 700 for laboratory analysis and comparison.

[0071] In one embodiment, the sampling head 700 can be a switch valve, which is opened to allow the sample liquid to flow out of the flow-through chamber 110 when the sample liquid needs to be taken out for laboratory analysis and comparison, and which is closed to prevent the sample liquid from flowing out when the sample liquid does not need to be taken out.

[0072] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the following claims and their equivalents.

Claims

1. A residual chlorine measuring device for detecting the chlorine content in a test liquid, characterized in that, The application relates to a residual chlorine measuring device. The device body, the electrode assembly, the rotating part and the electromagnetic driving part; The device body is internally provided with a flow cavity for the flow of a to-be-measured liquid; The electrode assembly comprises a base, a first electrode and a second electrode, the base is installed in the device body, one end of the first electrode is connected to the base, the other end of the first electrode extends towards the flow cavity to form a detection part, the second electrode is arranged on the side of the base facing the flow cavity, and the detection part and the second electrode cooperate to detect the chlorine content in the to-be-measured liquid; The rotating part is rotationally connected to the first electrode, and the second electrode at least partially contacts the rotating part; The electromagnetic driving part comprises a first driving part and a second driving part, the first driving part is arranged in the base, the second driving part is arranged in the rotating part, the first driving part and the second driving part are oppositely arranged, at least one of the first driving part and the second driving part is adapted to be electrically connected with an external power supply, so that the first driving part and the second driving part generate relative movement under the action of a magnetic field, thereby driving the rotating part to rotate and cleaning impurities on the surfaces of the first electrode and the second electrode.

2. The residual chlorine measuring device according to claim 1, wherein The first driving part is one of an electromagnet and a permanent magnet, and the second driving part is the other one of the electromagnet and the permanent magnet.

3. The residual chlorine measuring device according to claim 2, wherein The rotating part comprises a rotating part and a wing part, the wing part is arranged at both ends of the rotating part along a direction perpendicular to the rotation axis of the rotating part, the rotating part is rotationally connected to the detection part, and the second driving part is arranged in the wing part.

4. The residual chlorine measuring device according to claim 1, wherein The device body is provided with an inlet hole, a first outlet hole and a second outlet hole which communicate with the flow cavity; along the rotation axis direction of the rotating part, the inner wall of the flow cavity is provided with a protruding part at a position corresponding to the detection part, the protruding part is provided with a flow channel, and the flow channel communicates the first outlet hole and the flow cavity; The to-be-measured liquid enters the flow cavity from the inlet hole, the rotating part rotates relative to the first electrode to agitate the to-be-measured liquid, so that the gas bubbles in the to-be-measured liquid accumulate in the flow channel and are discharged from the first outlet hole, and the second outlet hole is used for discharging the to-be-measured liquid after detection.

5. The residual chlorine measuring device according to claim 4, wherein The flow channel has oppositely arranged first and second ends, the first end communicates with the flow cavity, the second end communicates with the first outlet hole, and the flow cross-sectional area of the flow channel gradually decreases from the first end to the second end.

6. The residual chlorine measuring device according to claim 4, wherein The outer wall of the protruding part and the inner wall of the flow cavity form a collection groove, and the second outlet hole communicates with the collection groove.

7. The residual chlorine measuring device according to any one of claims 1 to 6, characterized by The residual chlorine measuring device further comprises a rotating speed detection part which is installed in the device body and is used for detecting the rotating speed of the rotating part.

8. The residual chlorine measuring device according to claim 7, wherein The residual chlorine measuring device further comprises a controller which is electrically connected with the electrode assembly and the electromagnetic driving part, and is used for changing the frequency of the rotating magnetic field generated by the electromagnetic driving part based on the detection result of the electrode assembly.

9. The residual chlorine measuring device according to claim 7, wherein The residual chlorine measuring device further comprises a temperature detecting member installed in the device main body and at least partially extending into the flow cavity for detecting the temperature of the liquid to be measured. And / or, the residual chlorine measuring device further comprises a third electrode installed in the device main body and at least partially extending into the flow cavity, the third electrode cooperating with the first electrode and the second electrode to detect the chlorine content in the liquid to be measured.

10. The residual chlorine measuring device according to claim 7, wherein The residual chlorine measuring device further comprises a sampling head installed in the device main body and communicating with the flow cavity for leading out the liquid to be measured.

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